Method of creating master data used for inspecting concave-convex figure

Abstract

An image of respective figures is cut out by selecting a figure from tire CAD drawings, and an arranging position of the figure is set in accordance with a distance in a radial direction form a tire center and a deformed angle in a circumferential direction of the tire from a designated location, so that a height of respective regions of the cut-out image is set. Then, the cut-out image is transformed into an image having a gray scale in accordance with the height by using the height information of respective regions, and, at an arranging position of the figure, the image having a gray scale is sampled by a predetermined interval in a radial direction from a tire center and is sampled by a predetermined angle interval in a circumferential direction of the tire, so that master data are created by the image and a distance between intersecting points becomes equal.

1. A method of creating master data used for inspecting a figure having concave and convex portions formed on a surface of tire from tire computer-aided design (CAD) drawings, which have figures deformed according to a tire size and deformed into a sector form according to an arranging position in a radial direction from a tire center, and a height information of respective regions of the figure, comprising the steps of:
 cutting-out an image including the figure by selecting the figure from the tire CAD drawings; and 
 transforming respective regions of the cut-out image into a gray scale in accordance with a height information of respective regions obtained from the tire CAD drawings. 
 
     
     
       2. The method of creating master data used for inspecting a figure having concave and convex portions according to  claim 1 , further comprising a step of: deforming the cut-out image in accordance with the tire size and the arranging position in a radial direction from the tire center in such a manner that it becomes an original figure before deforming the figure included in the cut-out image into the sector form. 
     
     
       3. A method of creating master data used for inspecting a figure having concave and convex portions formed on a surface of tire from tire computer-aided design (CAD) drawings, which have figures deformed according to a tire size and deformed into a sector form according to an arranging position in a radial direction from a tire center, and a height information of respective regions of the figure, comprising the steps of:
 cutting-out an image including the figure by selecting the figure from the tire CAD drawings; 
 transforming respective regions of the cut-out image into a gray scale in accordance with a height information of respective regions obtained from the tire CAD drawings; and 
 deforming the image transformed into a gray scale in accordance with the tire size and the arranging position in a radial direction from the tire center in such a manner that it becomes an original figure before deforming the figure included in the image transformed into a gray scale into the sector form. 
 
     
     
       4. A method of creating master data used for inspecting a figure having concave and convex portions formed on a surface of tire from tire computer-aided design (CAD) drawings, which have figures deformed according to a tire size and deformed into a sector form according to an arranging position in a radial direction from a tire center, and a height information of respective regions of the figure, comprising the steps of:
 cutting-out an image including the figure by selecting the figure from the tire CAD drawings; 
 deforming the cut-out image in accordance with the tire size and the arranging position in a radial direction from the tire center in such a manner that it becomes an original figure before deforming the figure included in the cut-out image into the sector form; and 
 transforming respective regions of the transformed image into a gray scale in accordance with a height information of respective regions obtained from the tire CAD drawings.